Network
| Head Office | 1-2-1 Shibaura, Minato-ku, Tokyo 105-8634, Japan Map to the Head Office Tel:03-5444-0808 |
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Offices
| Tokyo Office | 1-2-1 Shibaura, Minato-ku, Tokyo 105-8634, Japan Tel:Domestic Sales 03-5444-3913 Tel:International Sales 03-5444-3918 |
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| Osaka Office | 5-5-15 Nishinakajima, Yodogawa-ku, Osaka 532-0011, Japan Tel:06-6307-7640 |
| Fukuoka Office | 3-1 Shimokawabatamachi, Hakata-ku, Fukuoka 812-0027, Japan Tel:092-291-7767 |
Plants
| Imari Factory | 826-1 Nagahama, Higashiyamashiro-cho, Imari-shi, Saga 849-4271, Japan Tel:0955-22-7015 |
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| Saga Plant | 2201 Oaza Kamioda, Kohoku-cho, Kishima-gun, Saga 849-0597, Japan Tel:0952-71-6555 |
| Kansai Factory (Ikuno) | 979 Atago, Kuchiganaya, Ikuno-cho, Asago-shi, Hyogo 679-3301, Japan Tel:0796-79-4482 |
| Kansai Factory (Amagasaki) | 1 Higashihama-cho, Amagasaki-shi, Hyogo 660-8533, Japan Tel:06-6430-7645 |
| Yonezawa Plant | 4-3146-12 Hachimanpara, Yonezawa-shi, Yamagata 992-1128, Japan Tel:0238-28-3131 |
| Chitose Plant | 1007-62 Izumisawa, Chitose-shi, Hokkaido 066-0051, Japan Tel:0123-28-1877 |
Major Subsidiaries Companies
| SUMCO TECHXIV Corp. | 1324-2 Masuragahara, Omura, Nagasaki 856-8555, Japan |
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| Japan Super Quartz Corp. | 5-14-3 Barajima, Akita-shi, Akita 010-0065, Japan |
| SUMCO Solar Corp. | 260-100 Funao, Kainan-shi, Wakayama 642-0001, Japan |
| SUMCO Technology Corp. | 314 Nishisangao, Noda-shi, Chiba 278-0015, Japan |
| SUMCO Service Corp. | 2201 Oaza Kamioda, Kohoku-cho, Kishima-gun, Saga 849-0597, Japan |
| Minamata Denshi Co., Ltd. | 57-6 Hamamatsu-cho. Minamata-shi, Kumamoto 867-0068, Japan |
| SUMCO Support Corp. | 826-1 Nagahama, Higashiyamashiro-cho, Imari-shi, Saga 849-4271, Japan |
Major Subsidiaries Companies (Overseas)
| SUMCO Phoenix Corporation | 19801 North Tatum Blvd., Phoenix, AZ 85050, U.S.A. Tel：+1-480-473-6000 |
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| SUMCO Southwest Corporation | 19801 North Tatum Blvd., Phoenix, AZ 85050, U.S.A. Tel：+1-480-473-6000 |
| SUMCO Europe Sales Plc. | Horatio House 77-85 Fulham Palace Road, London W6 8SS, U.K. Tel：+44-20-8222-7390 |
| FORMOSA SUMCO TECHNOLOGY CORPORATION |
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| PT. SUMCO Indonesia | MM2100 Industrial Town Block GG-6, Cikarang Barat, Bekasi 17520, INDONESIA Tel：+62-21-898-0003 |
| SUMCO Singapore Pte.Ltd. | 99,Bukit Timah Road, #04-01 Alfa Centre,Singapore 229835 Tel：+65-6883-1570 |
| SUMCO Shanghai Corporation | Room 2711, Shanghai Maxdo Center, No.8, Xingyi Rd, Shanghai 200336, China Tel：+86-21-5208-0333 |
| SUMCO Korea Corporation | 10F Samsung Life Insurance Seohyeon Bldg. 251-2 Seohyeon-Dong, Bundang-Gu, Sungnam-Si, Gyunggi-Do 463-824, KOREA Tel：+82-31-709-5732 |
| SUMCO Taiwan Technology Corporation | 8F, No.417, Sec.2, Gongdao 5th Road, HsinChu City, Taiwan R.O.C. Tel：+886-3-571-2838 |
